rebase: update kubernetes to v1.25.0

update kubernetes to latest v1.25.0
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/pod-security-admission/policy/helpers.go

@@ -0,0 +1,33 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package policy
+
+import "strings"
+
+func joinQuote(items []string) string {
+	if len(items) == 0 {
+		return ""
+	}
+	return `"` + strings.Join(items, `", "`) + `"`
+}
+
+func pluralize(singular, plural string, count int) string {
+	if count == 1 {
+		return singular
+	}
+	return plural
+}